The Nexus-Three or Prime whatever it's called will be the one phone to rule then all
Running the new Android update "Ice Cream" which is supposedly the biggest update to the Android OS in history, and rumored to be running a new HD Super AMOLED+ screen, dual cores, highest RAM on a phone to date, etc...
I don't see any phone topping the Nexus-Prime well into Summer 2012, the Galaxy S3 will beat it, but that's not due out until at least May of next year, so the new Nexus will be top dog for awhile. iPhone5 LOL yeah ok, not.
But if you need a new phone right now today, the Nexus-S is a very nice phone, I still think as of August 2011, the N-S is the top phone for the U.S. market in my opinion, spec's wise it is a little behind, but don't let the single core fool you, it is still a very capable phone. But if you willing to wait, get the next Nexus.